Auxin articles within Nature Communications

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  • Article
    | Open Access

    The mutation of ARFTF17 results in the development of flint kernel architecture in dent maize by reducing excessive pericarp length. This discovery holds significant potential for enhancing grain quality in elite, high-yielding dent maize hybrids.

    • Haihai Wang
    • , Yongcai Huang
    •  & Yongrui Wu

  • Article
    | Open Access

    miR408-5p typically regulates target IAA30 via translation repression, but switches to cleaving IAA30 mRNA under high auxin conditions. miR393, miR156, miR408-5p and their targets could hierarchically act in auxin pathway and regulate leaf inclination.

    • Fuxi Rong
    • , Yusong Lv
    •  & Liang Wu

  • Article
    | Open Access

    Auxin inactivation plays important roles in plant development. Here the authors show that the main route of IAA inactivation in Arabidopsis is via conjugation by GH3 IAA-amidosynthetases followed by DAO1 dioxygenase-mediated oxidation of the conjugated forms and hydrolysis by ILR1 to release inactive oxIAA.

    • Ken-ichiro Hayashi
    • , Kazushi Arai
    •  & Kosuke Fukui

  • Article
    | Open Access

    The apical style in Arabidopsis is formed following a bilateral-to-radial symmetry transition in the gynoecium. Here the authors show that the final step in style radialization is coordinated by the adaxial regulators HAT3 and ATHB4, which are induced by the SPT and HEC transcription factors.

    • Monica Carabelli
    • , Luana Turchi
    •  & Laila Moubayidin

  • Article
    | Open Access

    Auxin gradients regulate plant root growth and development. Here the authors manipulate auxin synthesis in specific root cell types and use single-cell nucleus tracking and morphokinetics to map directional auxin flow in the root and quantify the kinetics of meristem skewing.

    • Yangjie Hu
    • , Moutasem Omary
    •  & Eilon Shani

  • Article
    | Open Access

    Sieve element differentiation in Arabidopsis roots requires two antagonistic regulators of auxin efflux, BRX and PAX. Here the authors show that together they coordinate sieve element formation by preventing cell fate bistability emerging from AUX1-mediated competition for auxin between neighboring cells.

    • Bernard Moret
    • , Petra Marhava
    •  & Kirsten H. W. ten Tusscher

  • Article
    | Open Access

    Precise regulation of auxin concentration via transport and metabolism determines the developmental fate of plant tissues. Here the authors show that local auxin biosynthesis is regulated by TMK4-dependent phosphorylation of the TAA1 enzyme and that this is required for proper root development.

    • Qian Wang
    • , Guochen Qin
    •  & Tongda Xu

  • Article
    | Open Access

    Spatial control of auxin signaling maintains a balance between stem-cell self-renewal and differentiation at the plant shoot apex. Here Ma et al. show that rheostatic control of auxin response by the WUSCHEL transcription factor maintains stem cells by conferring resistance to auxin mediated differentiation.

    • Yanfei Ma
    • , Andrej Miotk
    •  & Jan U. Lohmann

  • Article
    | Open Access

    AUXIN RESPONSE FACTORS (ARFs) are a family of plant-specific transcriptional factors involved in auxin signaling. Here, the authors adapt DAP-seq technology to show the binding landscape of 14 maize ARFs and reveal class-specific binding properties and transcriptional coordination by ARFs from different classes.

    • Mary Galli
    • , Arjun Khakhar
    •  & Andrea Gallavotti

  • Article
    | Open Access

    Characterizing plant membrane transporters via genetic methods is complicated by functional redundancy among multi-gene transporter families. Here Zhang et al. use an artificial microRNA-based screen to overcome this issue and show that ABCB6 and ABCB20 act redundantly to regulate auxin transport.

    • Yuqin Zhang
    • , Victoria Nasser
    •  & Eilon Shani

  • Article
    | Open Access

    Auxin regulates multiple aspects of plant growth and development. Here Dindas et al. show that in root-hair cells, the AUX1 auxin influx carrier mediates proton-driven auxin import that is perceived by auxin receptors and coupled to Ca2+ waves that may modulate adaptive responses in the root.

    • Julian Dindas
    • , Sönke Scherzer
    •  & Rainer Hedrich

  • Article
    | Open Access

    Auxin activity controls plant stem cell function. Here the authors show that in the cambium, moderate auxin activity restricts cambial stem cell number via ARF5-dependent repression of the stem‐cell‐promoting factor WOX4, while ARF3 and ARF4 promote cambial activity outside of the WOX4‐expression domain.

    • Klaus Brackmann
    • , Jiyan Qi
    •  & Thomas Greb

  • Article
    | Open Access

    In Arabidopsis, the timing of floral meristem termination is determined by AGAMOUS. Here, the authors show that the CRC transcription factor, itself a direct target of AGAMOUS, coordinates meristem termination with subsequent gynoecium formation partly by repressing TRN2 expression and regulating auxin homeostasis.

    • Nobutoshi Yamaguchi
    • , Jiangbo Huang
    •  & Toshiro Ito

  • Article
    | Open Access

    The phytohormone auxin is sensed by SCFTIR1-AUX/IAA receptors leading to AUX/IAA repressor ubiquitylation and turnover. Here the authors show that IAA6 and IAA19 differ in their ubiquitylation and turnover dynamics, differentially contributing to auxin sensing and enabling discrimination of auxin concentrations.

    • Martin Winkler
    • , Michael Niemeyer
    •  & Luz Irina A. Calderón Villalobos

  • Article
    | Open Access

    Sphingolipids in the trans-Golgi network have been implicated in polar trafficking. Here Wattelet-Boyer et al. show that hydroxylated C24- and C26-acyl-chain sphingolipids are enriched in trans-Golgi network subdomains that are critical for polar sorting of the PIN2 auxin carrier in plant cells.

    • Valérie Wattelet-Boyer
    • , Lysiane Brocard
    •  & Yohann Boutté

  • Article
    | Open Access

    Lateral root development is dependent on precise control of the distribution of the plant hormone auxin. Here Chen et al. propose the transcription factors ARF7 and FLP participate in a feed forward motif to mediate expression of the auxin transporter PIN3and consequently regulate lateral root development.

    • Qian Chen
    • , Yang Liu
    •  & Steffen Vanneste

  • Article |

    The concerted action of the hormones cytokinin and auxin is an important regulator of plant development. Here Šimášková et al. propose a mechanistic basis by which cytokinin-responsive transcription factors regulate transport of auxin in Arabidopsisroots.

    • Mária Šimášková
    • , José Antonio O’Brien
    •  & Eva Benková

  • Article |

    The PIF4 transcription factor promotes stem elongation by inducing auxin biosynthesis at elevated temperature in Arabidopsis. Here, Lee et al.show that the RNA-binding protein FCA attenuates PIF4 activity by promoting its dissociation from the promoter of a gene encoding an auxin biosynthetic enzyme.

    • Hyo-Jun Lee
    • , Jae-Hoon Jung
    •  & Chung-Mo Park

  • Article |

    The transcriptional effects of auxin signalling are mediated by auxin response factors (ARFs) that interact with inhibitory IAA proteins. Nanao et al.present the crystal structure of domain III/IV of ARF5, revealing the structural basis for its interaction with IAAs and its potential to trigger ARF5 oligomerization.

    • Max H. Nanao
    • , Thomas Vinos-Poyo
    •  & Renaud Dumas

  • Article |

    Stomata regulate gas exchange between plants and the atmosphere but whether the plant hormone auxin regulates stomatal development has not been investigated. Here, the authors reveal dynamic changes of auxin activity levels during stomatal development and show that auxin transporters are required for stomatal patterning.

    • Jie Le
    • , Xu-Guang Liu
    •  & Fred Sack

  • Article
    | Open Access

    The plant hormone auxin is essential for plant development and growth and is transported across cellular membranes via specialized transporter proteins. In this study, Ranocha et al. identify the first vacuolar auxin transporter, WAT1, suggesting an involvement of the vacuole in auxin signalling.

    • Philippe Ranocha
    • , Oana Dima
    •  & Deborah Goffner

  • Article |

    The plant hormone auxin controls growth and development, and is recognized by auxin-binding protein 1 (ABP1) and other receptors. In this study, Tromas et al.investigate the role of ABP1 and show that the protein functions upstream of other auxin receptors and controls auxin repressors via the SCF ubiquitin ligase pathway.

    • Alexandre Tromas
    • , Sébastien Paque
    •  & Catherine Perrot-Rechenmann

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